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Commit: 1e07ec7b45647e6d931133f8b7dc9e372b9531ef
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From 1519bcc302d20d30b5115d53aa4c1735c72d7db0 Mon Sep 17 00:00:00 2001
Message-Id: <1519bcc302d20d30b5115d53aa4c1735c72d7db0@dist-git>
From: Jiri Denemark <jdenemar@redhat.com>
Date: Fri, 27 Mar 2015 12:48:40 +0100
Subject: [PATCH] RHEL: Hack around changed Broadwell/Haswell CPUs

RHEL-only

Upstream tried to solve the change of Broadwell and Haswell CPUs by
removing rtm and hle features from the corresponding CPU models for new
machine types. Then they reverted this and introduced new *-noTSX models
instead. However, the original fix was backported to RHEL.

This patch makes sure Broadwell and Haswell will always contain rtm and
hle features regardless on RHEL version or machine type used.

https://bugzilla.redhat.com/show_bug.cgi?id=1199446

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/qemu/qemu_command.c                       | 22 +++++++++++++++++++
 tests/qemuxml2argvdata/cpu-Haswell.args       |  2 +-
 .../qemuxml2argvdata/cpu-host-model-cmt.args  |  2 +-
 .../cpu-translation.x86_64-4.0.0.args         |  2 +-
 .../cpu-translation.x86_64-latest.args        |  2 +-
 tests/qemuxml2argvdata/cpu-tsc-frequency.args |  2 +-
 tests/qemuxml2argvdata/q35-acpi-nouefi.args   |  2 +-
 tests/qemuxml2argvdata/q35-acpi-uefi.args     |  2 +-
 tests/qemuxml2argvdata/q35-noacpi-nouefi.args |  2 +-
 9 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index c47998aabd..b5feaeb2c2 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6614,6 +6614,8 @@ qemuBuildCpuModelArgStr(virQEMUDriver *driver,
 {
     size_t i;
     virCPUDef *cpu = def->cpu;
+    bool hle = false;
+    bool rtm = false;
 
     switch ((virCPUMode) cpu->mode) {
     case VIR_CPU_MODE_HOST_PASSTHROUGH:
@@ -6680,6 +6682,12 @@ qemuBuildCpuModelArgStr(virQEMUDriver *driver,
     for (i = 0; i < cpu->nfeatures; i++) {
         const char *featname =
             virQEMUCapsCPUFeatureToQEMU(qemuCaps, cpu->features[i].name);
+
+        if (STREQ("rtm", cpu->features[i].name))
+            rtm = true;
+        if (STREQ("hle", cpu->features[i].name))
+            hle = true;
+
         switch ((virCPUFeaturePolicy) cpu->features[i].policy) {
         case VIR_CPU_FEATURE_FORCE:
         case VIR_CPU_FEATURE_REQUIRE:
@@ -6697,6 +6705,20 @@ qemuBuildCpuModelArgStr(virQEMUDriver *driver,
         }
     }
 
+    /* Some versions of qemu-kvm in RHEL provide Broadwell and Haswell CPU
+     * models which lack rtm and hle features when used with some machine
+     * types. Let's make sure Broadwell and Haswell will always have these
+     * features. But only if the features were not explicitly mentioned in
+     * the guest CPU definition.
+     */
+    if (STREQ_NULLABLE(cpu->model, "Broadwell") ||
+        STREQ_NULLABLE(cpu->model, "Haswell")) {
+        if (!rtm)
+            virBufferAddLit(buf, ",rtm=on");
+        if (!hle)
+            virBufferAddLit(buf, ",hle=on");
+    }
+
     return 0;
 }
 
diff --git a/tests/qemuxml2argvdata/cpu-Haswell.args b/tests/qemuxml2argvdata/cpu-Haswell.args
index b57fdfddc5..965274c1f0 100644
--- a/tests/qemuxml2argvdata/cpu-Haswell.args
+++ b/tests/qemuxml2argvdata/cpu-Haswell.args
@@ -13,7 +13,7 @@ QEMU_AUDIO_DRV=none \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc,usb=off,dump-guest-core=off \
 -accel kvm \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -m 214 \
 -realtime mlock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/cpu-host-model-cmt.args b/tests/qemuxml2argvdata/cpu-host-model-cmt.args
index 0de04e877d..602f70de86 100644
--- a/tests/qemuxml2argvdata/cpu-host-model-cmt.args
+++ b/tests/qemuxml2argvdata/cpu-host-model-cmt.args
@@ -13,7 +13,7 @@ QEMU_AUDIO_DRV=none \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc,usb=off,dump-guest-core=off \
 -accel tcg \
--cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on \
+-cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on,rtm=on,hle=on \
 -m 214 \
 -realtime mlock=off \
 -smp 6,sockets=6,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args b/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args
index 09141106d5..ace08d5d76 100644
--- a/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args
+++ b/tests/qemuxml2argvdata/cpu-translation.x86_64-4.0.0.args
@@ -13,7 +13,7 @@ QEMU_AUDIO_DRV=none \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc-i440fx-4.0,usb=off,dump-guest-core=off \
 -accel tcg \
--cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
+-cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,rtm=on,hle=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
 -m 214 \
 -overcommit mem-lock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args b/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
index 866b7363b8..4f662703e6 100644
--- a/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/cpu-translation.x86_64-latest.args
@@ -12,7 +12,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-QEMUGuest1/master-key.aes"}' \
 -machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram \
 -accel tcg \
--cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
+-cpu Haswell,pclmulqdq=on,ds-cpl=on,tsc-adjust=on,fxsr-opt=on,lahf-lm=on,cmp-legacy=on,nodeid-msr=on,perfctr-core=on,perfctr-nb=on,rtm=on,hle=on,kvm-pv-eoi=on,kvm-pv-unhalt=on \
 -m 214 \
 -object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \
 -overcommit mem-lock=off \
diff --git a/tests/qemuxml2argvdata/cpu-tsc-frequency.args b/tests/qemuxml2argvdata/cpu-tsc-frequency.args
index 4a032f5d85..48fb75abcc 100644
--- a/tests/qemuxml2argvdata/cpu-tsc-frequency.args
+++ b/tests/qemuxml2argvdata/cpu-tsc-frequency.args
@@ -13,7 +13,7 @@ QEMU_AUDIO_DRV=none \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc,usb=off,dump-guest-core=off \
 -accel kvm \
--cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on,invtsc=on,tsc-frequency=4567890000 \
+-cpu Haswell,vme=on,ds=on,acpi=on,ss=on,ht=on,tm=on,pbe=on,dtes64=on,monitor=on,ds-cpl=on,vmx=on,smx=on,est=on,tm2=on,xtpr=on,pdcm=on,f16c=on,rdrand=on,pdpe1gb=on,abm=on,lahf-lm=on,invtsc=on,rtm=on,hle=on,tsc-frequency=4567890000 \
 -m 214 \
 -realtime mlock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/q35-acpi-nouefi.args b/tests/qemuxml2argvdata/q35-acpi-nouefi.args
index 3faee48c77..a1f742712d 100644
--- a/tests/qemuxml2argvdata/q35-acpi-nouefi.args
+++ b/tests/qemuxml2argvdata/q35-acpi-nouefi.args
@@ -13,7 +13,7 @@ QEMU_AUDIO_DRV=none \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-guest/master-key.aes \
 -machine q35,usb=off,dump-guest-core=off \
 -accel tcg \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -m 1024 \
 -realtime mlock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
diff --git a/tests/qemuxml2argvdata/q35-acpi-uefi.args b/tests/qemuxml2argvdata/q35-acpi-uefi.args
index 60da1e282a..620056223a 100644
--- a/tests/qemuxml2argvdata/q35-acpi-uefi.args
+++ b/tests/qemuxml2argvdata/q35-acpi-uefi.args
@@ -13,7 +13,7 @@ QEMU_AUDIO_DRV=none \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-guest/master-key.aes \
 -machine q35,usb=off,dump-guest-core=off \
 -accel tcg \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -drive file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on \
 -drive file=/var/lib/libvirt/qemu/nvram/guest_VARS.fd,if=pflash,format=raw,unit=1 \
 -m 1024 \
diff --git a/tests/qemuxml2argvdata/q35-noacpi-nouefi.args b/tests/qemuxml2argvdata/q35-noacpi-nouefi.args
index 14e5bbc22a..ea66536c2a 100644
--- a/tests/qemuxml2argvdata/q35-noacpi-nouefi.args
+++ b/tests/qemuxml2argvdata/q35-noacpi-nouefi.args
@@ -13,7 +13,7 @@ QEMU_AUDIO_DRV=none \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-guest/master-key.aes \
 -machine q35,usb=off,dump-guest-core=off \
 -accel tcg \
--cpu Haswell \
+-cpu Haswell,rtm=on,hle=on \
 -m 1024 \
 -realtime mlock=off \
 -smp 1,sockets=1,cores=1,threads=1 \
-- 
2.34.1
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